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Reports calls to
<code>String.replaceAll()</code> or <code>String.split()</code> where the first argument is a single regex meta character argument.
<p>
  The regex meta characters are one of <code>.$|()[{^?*+\</code>. They have a special meaning in regular expressions.
  For example, calling <code>"ab.cd".replaceAll(".", "-")</code> produces <code>"-----"</code>, because the dot matches any character.
  Most likely the escaped variant <code>"\\."</code> was intended instead.
</p>
<p>
  Using <code>File.separator</code> as a regex is also reported. The <code>File.separator</code> has a platform specific value. It
  equals to <code>/</code> on Linux and Mac but equals to <code>\</code> on Windows, which is not a valid regular expression, so 
  such code is not portable.
</p>

<p><b>Example:</b></p>
<pre><code>
  s.replaceAll(".", "-");
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  s.replaceAll("\\.", "-");
</code></pre>
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